/* =========================================================
   MR Consulting LLC — Shared Stylesheet
   Engineering-firm aesthetic: clean, precise, fast.
   ========================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Color */
  --ink:        #0d2438;   /* deep navy — headings, primary surfaces */
  --ink-soft:   #16344f;
  --slate:      #2b3742;   /* body text */
  --muted:      #5d6b7a;   /* secondary text */
  --line:       #e2e8f0;   /* hairlines, borders */
  --bg:         #ffffff;
  --bg-cool:    #f4f6f9;   /* alternating section bg */
  --accent:     #1d6fae;   /* steel blue — links, CTAs */
  --accent-dk:  #155a90;
  --accent-soft:#e8f1f8;
  --white:      #ffffff;

  /* Type */
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;

  /* Layout */
  --maxw: 1120px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 10px;
  --shadow: 0 1px 2px rgba(13, 36, 56, .06), 0 8px 24px rgba(13, 36, 56, .06);

  /* Motion */
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--slate);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 .5em;
  font-weight: 700;
}

h1 { font-size: clamp(2.1rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.25rem); }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; }

p { margin: 0 0 1.1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--accent); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--accent-dk); }

/* Links inside prose need more than color to stand out (WCAG 1.4.1) */
main p a:not(.btn) {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Visible keyboard focus, with a light ring on dark surfaces */
a:focus-visible, button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.hero :focus-visible, .section--ink :focus-visible, .site-footer :focus-visible {
  outline-color: #7db8e0;
}

.skip-link {
  position: fixed;
  top: .75rem; left: .75rem;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  padding: .65rem 1.1rem;
  border-radius: 8px;
  transform: translateY(-250%);
}
.skip-link:focus { transform: none; }

strong { color: var(--ink-soft); font-weight: 600; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--cool { background: var(--bg-cool); }
.section--ink  { background: var(--ink); color: #c9d6e2; }
.section--ink h2, .section--ink h3 { color: #fff; }

.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .9rem;
}
.section--ink .eyebrow { color: #7db8e0; }

.lead { font-size: 1.2rem; color: var(--muted); max-width: 60ch; }

.section-head { max-width: 62ch; margin-bottom: 2.75rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 600;
  font-size: 1rem;
  padding: .8rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s var(--ease), background .15s var(--ease),
              border-color .15s var(--ease), color .15s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--accent-dk); color: #fff; }
.btn--primary:hover { background: #114a77; color: #fff; }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover { background: var(--accent-soft); color: var(--accent-dk); }

.btn-row { display: flex; flex-wrap: wrap; gap: .85rem; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  font-size: 1.18rem;
}
.brand:hover { color: var(--ink); }
.brand .brand-mark {
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.04em;
}
.brand .brand-sub {
  font-size: .82rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--slate);
  font-weight: 500;
  font-size: .98rem;
  padding: .35rem 0;
  position: relative;
}
.nav-links a:hover { color: var(--ink); }
/* .nav-links a outranks .btn--primary in the cascade — re-assert button text color */
.nav-links a.btn--primary, .nav-links a.btn--primary:hover { color: #fff; }
.nav-links a.is-active { color: var(--ink); font-weight: 600; }
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-links .btn { padding: .55rem 1.1rem; font-size: .95rem; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  cursor: pointer;
  padding: .5rem;
  margin: -.5rem;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.nav-toggle span + span { margin-top: 6px; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: .5rem var(--gutter) 1.25rem;
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { border-top: 1px solid var(--line); }
  .nav-links li:first-child { border-top: 0; }
  .nav-links a { display: block; padding: .9rem 0; }
  .nav-links a.is-active::after { display: none; }
  .nav-links .btn-li { padding-top: 1rem; border-top: 0; }
  .nav-links .btn { width: 100%; justify-content: center; }
  .nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(120% 120% at 85% -10%, #173a59 0%, var(--ink) 55%);
  color: #d6e2ee;
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(4rem, 9vw, 6.5rem);
  position: relative;
  overflow: hidden;
}
.hero::after { /* subtle circuit-grid texture */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(125,184,224,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,184,224,.06) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(120% 120% at 80% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { color: #fff; max-width: 18ch; }
.hero .hero-lead {
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  color: #aec6db;
  max-width: 58ch;
  margin-top: 1.25rem;
}
.hero .eyebrow { color: #7db8e0; }
.hero .btn-row { margin-top: 2rem; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr; } }
@media (max-width: 680px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.85rem;
  box-shadow: var(--shadow);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 34px rgba(13,36,56,.12); }
.card .card-num {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--accent);
}
.card h3 { margin-top: .5rem; }
.card p { color: var(--muted); font-size: 1rem; }
.card ul { margin: .75rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: .97rem; }
.card ul li { margin-bottom: .35rem; }

/* Plain feature list (no card) */
.feature h3 { display: flex; align-items: center; gap: .6rem; }
.feature .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent); flex: 0 0 auto;
}

/* ---------- "Who this is for" ---------- */
.audience-list {
  list-style: none; margin: 1.5rem 0 0; padding: 0;
  display: grid; gap: 1rem;
}
.audience-list li {
  display: flex; gap: .85rem; align-items: flex-start;
  font-size: 1.05rem;
}
.audience-list .check {
  flex: 0 0 auto; margin-top: .35rem;
  width: 20px; height: 20px;
}
.check svg { display: block; }

/* ---------- Split (about) ---------- */
.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
@media (max-width: 880px) { .split { grid-template-columns: 1fr; } }

.facts {
  background: var(--bg-cool);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.facts dl { margin: 0; display: grid; gap: 1.1rem; }
.facts dt {
  font-size: .78rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); margin-bottom: .15rem;
}
.facts dd { margin: 0; color: var(--slate); }

/* ---------- Tag chips ---------- */
.tags { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1rem; }
.tag {
  font-size: .85rem; font-weight: 500;
  background: var(--accent-soft); color: var(--accent-dk);
  border: 1px solid #cfe2f1;
  padding: .35rem .8rem; border-radius: 999px;
}

/* ---------- CTA band ---------- */
.cta-band { text-align: center; }
.cta-band h2 { color: #fff; max-width: 22ch; margin-inline: auto; }
.cta-band p { color: #aec6db; max-width: 52ch; margin: 1rem auto 1.75rem; }
.cta-band .btn-row { justify-content: center; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-method {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1.4rem 0; border-top: 1px solid var(--line);
}
.contact-method:first-of-type { border-top: 0; }
.contact-method .ic {
  flex: 0 0 auto; width: 42px; height: 42px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-dk);
  border-radius: 10px;
}
.contact-method h3 { font-size: 1.05rem; margin-bottom: .15rem; }
.contact-method p { font-size: .98rem; color: var(--muted); margin: 0; }

.placeholder {
  background: #fff4d6;
  border-bottom: 1px dashed #d9a300;
  color: #6b5200;
  padding: 0 .15em;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: #8ba3ba;
  padding: 3rem 0 2rem;
  font-size: .95rem;
}
.footer-top {
  display: flex; flex-wrap: wrap; gap: 2rem;
  justify-content: space-between; align-items: flex-start;
  padding-bottom: 2rem; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand { color: #fff; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.footer-brand span { color: #7db8e0; }
.footer-tagline { margin-top: .5rem; max-width: 36ch; color: #8ba3ba; }
.footer-nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-nav a { color: #c9d6e2; font-weight: 500; }
.footer-nav a:hover { color: #fff; }
.footer-bottom {
  padding-top: 1.5rem; display: flex; flex-wrap: wrap;
  gap: .5rem 1.5rem; justify-content: space-between;
  font-size: .88rem; color: #7f96ac;
}
.footer-bottom a { color: #8ba3ba; }
.footer-bottom a:hover { color: #fff; }

/* ---------- Utilities ---------- */
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}